Siemens SIMATIC S7-200 System Manual page 351

High byte
15 14 13 12 11
0=
0= Motor holding brake active
0= Motor overload
1 = Motor running direction right
0= Inverter overload
Figure 11-4 Status Bits for Standard Status Word for MicroMaster 4 and Main Feedback
Example: USS_CTRL Subroutine
Using the USS Protocol Library to Control a MicroMaster Drive
10 9 8 7 6 5
0 = OFF3 (Quick stop command present)
1 = Switch-on inhibit
1 = Drive warning present
1 = Not used (always 1)
1 = Serial operation allowed
0 = Serial operation blocked - - local operation only
1 = Frequency reached
0 = Frequency not reached
Warning: Motor current limit
Low byte
4 3 2 1 0
1 = Ready to start
1 = Ready to operate
1 = Operation enabled
1 = Drive fault present
0 = OFF2 (Coast stop command present)
To display in STL only:
Network 1 //Control box for drive 0
LD SM0.0
CALL USS_CTRL, I0.0, I0.1, I0.2, I0.3,
I0.4, 0, 1, 100.0, M0.0, VB2, VW4,
VD6, Q0.0, Q0.1, Q0.2, Q0.3
To display in LAD or FBD:
Network 1 //Control box for drive 0
LD SM0.0
= L60.0
LD I0.0
= L63.7
LD I0.1
= L63.6
LD I0.2
= L63.5
LD I0.3
= L63.4
LD I0.4
= L63.3
LD L60.0
CALL USS_CTRL, L63.7, L63.6, L63.5,
L63.4, L63.3, 0, 1, 100.0, M0.0,
VB2, VW4, VD6, Q0.0, Q0.1, Q0.2,
Q0.3
Chapter 11
337